Spice and other psychoactive substances remain a major problem at an East Yorkshire prison - despite improvements made in the past 12 months.

On average, there has been 10 calls a week for medical assistance at HMP Humber after inmates reacted badly to using the drug. It has also been responsible for increasing violence on the prison wings at HMP Humber according to the latest report.

Inspectors from the Independent Monitoring Board visited the category C prison in Everthorpe on numerous occasions during the past year and found drug use and associated debt is the cause of the majority of fights and conflicts between prisoners.

The report also reveals the prison governor makes sure all the mail to inmates is photocopied as an additional security measure to stop drugs getting into cells.

Spice has been linked to mood swings and paranoia (Image: Leon Neal/AFP/Getty Images)

The report reads: "Psychoactive substances continue to be a major issue for healthcare within HMP Humber.

"There were 533 calls (for medical help) in the reporting period (January 2017 to December 2017) making an average of 10 calls per week.

Overall, the report states there has been significant improvements at the prison and praised the governor and staff. It reads: "The prison continues to work hard and, through the implementation of a number of strategic and procedural changes, is succeeding in improving staff morale and conditions for the prisoners."

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The condition of prisoner's cells and the food served was also deemed reasonable as it was revealed hot meals are being reintroduced at tea time instead of lunch.

The report reveals how the prison uses national incentives and earned privileges scheme to encourage positive behaviour from inmates. There is also a wing cleaning competition every month.

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A broad range of education is also offered at the prison with courses in English and maths. The prison also has a workshop for inmates to develop computer and smartphone apps by writing computer code.

HMP Humber

Responding to the results of the inspection, a Prison Service spokesman said more improvements have been made at HMP Humber.

He said: "Since this report HMP Humber have taken a range of measures to tackle drugs including extending substance misuse support to seven days a week, and increasing mandatory drug testing and the testing of incoming post.